Crushing-machine.



A. G. J. RAPP. CRUSHING MACHINE. APPLICATION HLEDlUNEZ3| 1915.

Patented'June 20, 1916.

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CRUSHING MACHINE.

ATION FIL D Patented June 20, 1916.

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AXEL J". RAPP, OF CHICAGO, ILLINOIS, ASSIG-NOR TO LINK-BELT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CRUSHING-MACHINE.

Specification of Letters Patent.

Patented June so. rare.

Original application filed March 29, 1915, Serial No. 5,449. Divided and this application filed June 23,

1915. Serial No. 35,760.

To all whom it may concern:

Be it known that I, AXEL G. J. RAPP, a

citizen of the United States, residing at Chicago, in the county of Cook and Stateof Illinois, have invented a certain new and useful Improvement in Crushing-Machines, of which the following is a specification, and is based upon the subject-matter contained in and divided out of my copending appli-' cation, No. 5,449, filed March 29, 1915, for crushing-machines.

My invention relates to improvements in crushing machines and has particular relation to that type of machine wherein the material to be reduced is crushed between the concave fixedplate and the rotating roll. and wherein the crushing is accomplished by teeth or knobs on the roll and wherein the material is drawndown into the aperture between the concave and the roll by a series of projecting spikes or teeth.

One object is to provide means for feeding the material to these teeth or'spikes to prevent clogging of the machine.

Other objects of my invention w1ll appear in the specification.

My invention is, therefore, illustrated more or less diagrammatically in the accompanying drawings, wherein Figure 1 is a side elevation of a crushing machine; Fig. 2 is a detail section through a crushing zone; Fig. 3 is a section on an enlarged scale through the crushing drum showing the means for removably attaching one of the teeth; Fig. 4 is aidetail plan view on an enlarged scale of one of the teeth or cutter holding levers; Fig. 5 is a perspective of the surface of one of the concaves; Fig. 6 is a section on Fig. 5'; Fig. 7 is a detail section through the crushing concave along the line parallel with the axis of rotation of the drum; and Fig. 8 is a section througha concave and crushing roll showing the relation between the corrugations in the concave and the feeder teeth inthe roll.

Like parts are indicated by like letters throughout the several figures.

A is a main frame. A a hopper carried thereby. A a concave. It is held in position in the main frame by the shafts A A.

A is the crushing drum mounted on and rotating with the shaft A which is rotatably mounted on the frame A.

A is a driving pulley connected to the tle.

usual manner.

shaft A by any suitable 'driving means not 'shown and geared down to increase the availableforce for rotating the drum.

A is a holding link pressed yieldingly toward the drum by the spring A and engaging at its rear end the shaft A so that the lower edge of the concave is pressed yieldingly toward the crushing drum.

' B, B. are removable crushing mantles or jackets on the roll or drum. They have integral knobs or lugs B adapted to assist in the serrated surface B on the under sides of the hollow holding lugs B Each pin is jammed into position against, such serrated surface by a wedge C which slidably enga es the inner side of the pin. The wedge is engaged by a curved cam-surface C on the locking lever C This locking lever rolls in a pocket C having a curved surface in engagement with the curved surface of the locking lever.

C is a stop lift in the locking lever which prevents-too great inward movement of the wedge and C is an adjusting screw screwthreaded in the surface of the concave B and engages the tail of the lever or dog C to rotate it in a counter clockwise direction and jam the wedge against the pin or tooth.

The lever itself is slotted or apertured to engage the end of the tooth. The function of the wedge is to make the device universal in its action so that different sizes of teeth, levers and pockets may cooperate without interfering with the operation of the device. It may be as thick or as thin as necessary to enable a strong bite to be taken on ,the tooth and by this varying thickness it compensates for all the other inaccuracies of the other parts. The tooth has a sharp point.

and this gradually wears down in operation and may be renewed and sharpenedin the The'concave as shown in Figs. 5, 6 and 7 is made up of'a series of separate irregular curved surfaces. These surfaces it will be observed are. tilted and the bounding lines converge as indicated so that they tend to feed or discharge the material to be crushed centrally from both sides toward parallel lines. The arrangement of the device is such that these parallel lines toward which the material is fed are the lines along which the teeth are located. The result is that the objects or particles fed into the machine as they pass down toward'the crushing point are fed across the concaves toward the lines of action of the grabbing or feeding teeth.

This efiect may be obtained by any suitable arrangement of the'surface of the concave. By'my arrangement I insure that this cross feed will be taking place at all points and that most if not all of the material will be fed downwardly and inwardly toward the line of action of the feeding teeth before 7 the concave zone is reached.

It will be evident that while I have shown in my drawings an operative device still many changes might be made both in size, shape and arrangement of parts without departing materially from the'spirit of my invention, and I wish, therefore, that my drawings be regarded as in a sense diagrammatic. I I

The use and operation of my invention are as follows: My device is primarily intended for crushing soft material such as coal, ice and the like. The long feeding teeth catch this material and draw it down into the gradually decreasing space between the concave and roll so that it may be crushed and broken by'the small knobs on the roll, but experience shows that when the concave is fiat or truly cylindrical it is posin the side walls of the deeper vertical channels in the concave serve to guide the material and insure that it shall pass down gradually into or toward the bottom of the said side walls being deep channel thus preventing congestion and clogging of the machine.

I claim:

1. A crushing machine comprising a cylindrical roll, spaced feeding t eeth projecting beyond the crushing surface thereof, a curved concave inclined to the roll, the surface of said concave being channeled throughout its entire effective width along lines located in planes perpendicular to the axis of the roll, the side walls of said channels being inclined upwardly and outwardly from the axial line of the channel, said side walls be ng diagonally grooved, said grooves converging toward the roll in each channel.

2. A crushing machinecomprising a cylindrical roll, spaced feeding teeth projecting beyond the crushing surface thereof, a. curved concave inclined to the roll, the surface of said concave being channeled throughout its entire efiective width along lines located inplanes perpendicular to the axis of the roll, the axes of said channels being substantially in line with the feeding teeth on the roll, the side walls of said channels being inclined upwardly and outwardly from the axial line of the channel, diagonally grooved, said grooves converging toward the roll in each channel.

3. Av crushing machine comprising a' cylindrical crushing surface, spaced feeding teeth projecting outwardly beyond the crushing surface, a curved concave inclined to the roll projecting outwardly from and above the roll to form a receiving and feeding hopper, the surface of said concave being channeled throughout its entire effective width along lines located in planes perpendicular to the axis of the roll, the axes of the channels being substantially in line with the feeding teeth on the roll, the side walls of the channels being outwardly and upwardly inclined to meet along ridges between the feeding teeth.

In testimony whereof, I afiix my signature in the presence of two witnesses this '19th day of June, 1915.

. AXEL G. J. RAPR Witnesses;

CArrroLA F. WALKER,

OLIVE ERICKSON. 

